taxonID	type	description	language	source
DC5AD87DE01F9974D8BFFF3B8183034C.taxon	description	Similar to U. crustulosa, differing by apothecia with a single gyrus of sterile tissue, grey-brown to black lower surface with flattened to strap-like rhizinomorphs, smaller ascospores, and by producing umbilicaric acid. Type: — TURKEY. Prov. Izmir (35): southern slope of Yamanlar Dað, small valley N of Karþiyaka, 38 ° 30 ’ N, 27 ° 07 ’ E, elev. 125 m, on vertical siliceous rocks. 30 June 2001, V. John [V. John: Lichenes Anatolici Exsiccati, 171, as U. spodochroa Hoffm.] (holotype, M!, isotypes examined in ALTB! ex GZU, GZU!, LE L – 1933!). Sequences of the holotype: ITS: KY 947760; RPB 2: KY 972608; mtLSU: KY 947904. Thallus 2 – 4 cm in diam. and 0.2 – 0.3 mm thick, umbilicate, monophyllous. Upper surface pale to dark grey, sometimes with a brown or violet tinge, lighter at the center, minutely rimose, pruinose, more rough and partly radially folded in the center, sometimes with branched to strap-like rhizinomorphs (Fig. 2 C). Lower surface usually dirty ochre-brown to grey-brown and black, darker towards the center, rimose to coarsely papillate with abundant to scarce rhizinomorphs. Rhizinomorphs simple to few times branched under the sharp angle, often flattened to strap-like, ca. 1 mm long; colored at the base the same as the lower surface, and getting darker toward the tips, with rimose to papillate surface (Fig. 2 A – B). Thalloconidia absent. Upper cortex paraplectenchymatous, brownish in the outer part and hyaline in the inner part, 25 – 60 μm, epicortex 12 – 30 μm, algal layer continuous, 38 – 100 μm thick, algae Trebouxioid, with cells (5 –) 7 – 10 – 13 (– 15) μm in diam., medulla colourless, more or less loose, 75 – 95 μm thick, lower cortex colourless, scleroplectenchymatous, 25 – 80 μm thick, including a colourless inner layer 20 – 34 μm thick and a brown outer layer 15 – 40 μm thick. Apothecia frequent at the periphery of thalli, ca. 1 mm in diam., disc first flat, with age becoming convex, i. e. broadly cone-like with a single central protruding gyrus of sterile tissue (Fig. 2 D) with cells 5 – 9 μm diam. (Fig. 2 E); epihymenium brown, 13 – 25 μm thick; hymenium yellowish 65 – 92 μm thick, hypothecium ochre to light brown, 40 – 130 μm thick; excipulum inner part yellowish, outer part brown; paraphyses septate, branched, 2.5 μm thick, sometimes slightly thickened at the tips, up to 3 μm; asci 50 – 60 × 20 – 30 μm; ascospores hyaline, simple, (14.0 –) 16.0 – 17.5 – 18.5 (– 20.0) × (9.0 –) 9.5 – 11.5 – 13.0 (– 17.5) μm (N = 60). Pycnidia at the periphery of thalli, 125 – 175 μm in diameter, covered by cortex and algal layer, with black prominent ostiole, the wall brown, 10 μm thick, pycnoconidia bacilliform, 3 – 4 × 1 μm. Chemistry: gyrophoric (major), umbilicaric (minor), and lecanoric (minor) acids detected by TLC and HPLC; medulla K –, C + red, KC + red, Pd –, UV –.	en	Davydov, Evgeny A. (2022): Umbilicaria platyrhiza-a new Mediterranean endemic species of the subgenus Papillophora (Umbilicariaceae, lichenized Ascomycota). Phytotaxa 533 (2): 143-148, DOI: 10.11646/phytotaxa.533.2.3
DC5AD87DE01F9974D8BFFF3B8183034C.taxon	etymology	Etymology: platyrhiza derived from Greek πλατύς – ‘ wide, flat’, and ρίζα – ‘ root’, with reference to the flattened rhizinomorphs.	en	Davydov, Evgeny A. (2022): Umbilicaria platyrhiza-a new Mediterranean endemic species of the subgenus Papillophora (Umbilicariaceae, lichenized Ascomycota). Phytotaxa 533 (2): 143-148, DOI: 10.11646/phytotaxa.533.2.3
DC5AD87DE01F9974D8BFFF3B8183034C.taxon	biology_ecology	Ecology: Umbilicaria platyrhiza grows on siliceous rocks in maritime territories.	en	Davydov, Evgeny A. (2022): Umbilicaria platyrhiza-a new Mediterranean endemic species of the subgenus Papillophora (Umbilicariaceae, lichenized Ascomycota). Phytotaxa 533 (2): 143-148, DOI: 10.11646/phytotaxa.533.2.3
DC5AD87DE01F9974D8BFFF3B8183034C.taxon	distribution	Distribution: The species is so far known from only two localities in coastal territories of the Aegean Sea (Turkey, Izmir) and Black Sea (Bulgaria, Burgas). Additional specimens of Umbilicaria platyrhiza examined: BULGARIA. Burgas: loco Veselita skala dicto supra fl. Ropotamo prope inter Sozopol und Primorsko, alt. 30 m s. m. Ad saxa andesitica, 21 August 1977. A. Vežda [Exsicc. Lich. Sel. no. 1531, as U. spodochroa] (GZU – 324242!, GZU – s. n.!, ALTB! ex GZU).	en	Davydov, Evgeny A. (2022): Umbilicaria platyrhiza-a new Mediterranean endemic species of the subgenus Papillophora (Umbilicariaceae, lichenized Ascomycota). Phytotaxa 533 (2): 143-148, DOI: 10.11646/phytotaxa.533.2.3
